Espoo climate by month
What the weather is like
Espoo has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 22° and nights 14°. February is the coolest month, with highs of -2° and lows of -7°. The difference between the warmest and the coolest month is about 22°, a large swing typical of continental interiors.
About 735 mm of precipitation falls in an average year. December is the wettest month (65 mm, 15 wet days) and April the driest (35 mm, 9 wet days). Cloud cover ranges from 32% in May to 63% in December.
The sea reaches about 17° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Helsinki, the capital, Espoo is 0.5° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 22° · July
- Coldest nights
- -7° · February
- Wettest month
- December
- Driest month
- April
- Clearest skies
- May · 32% cloud
- Warmest sea
- 17° · August
- Longest day
- 18 h 53 min
- Shortest day
- 5 h 52 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -1° | -2° | 2° | 8° | 15° | 19° | 22° | 21° | 16° | 9° | 4° | 1° |
| Average low | -6° | -7° | -4° | 0° | 6° | 10° | 14° | 13° | 9° | 4° | 0° | -3° |
| Precipitation | 58 mm | 38 mm | 41 mm | 35 mm | 41 mm | 65 mm | 72 mm | 87 mm | 66 mm | 88 mm | 79 mm | 65 mm |
| Wet days (≥1 mm) | 13.5 | 11.3 | 10.1 | 9.3 | 9.6 | 11.8 | 13.3 | 13.2 | 12.6 | 13.2 | 14.8 | 15.3 |
| Cloud cover | 61% | 56% | 49% | 42% | 32% | 36% | 32% | 36% | 41% | 49% | 62% | 63% |
| Sea temperature | 2° | 1° | 1° | 2° | 6° | 11° | 16° | 17° | 14° | 10° | 7° | 4° |
| Daylight | 6h 39 | 9h 09 | 11h 42 | 14h 33 | 17h 10 | 18h 53 | 18h 09 | 15h 44 | 12h 57 | 10h 14 | 7h 33 | 5h 52 |
| Month score | 13 | 21 | 26 | 31 | 58 | 70 | 68 | 66 | 53 | 19 | 12 | 11 |